#183C4E#183C4E

#183C4E is a dark, muted cyan. Relative luminance 0.040; OKLCH L 33.9% C 0.052 H 233.0°. Best body text is #FFFFFF at 11.70:1 contrast (WCAG AA passes).

Color values

HEX	#183C4E
RGB	rgb(24, 60, 78)
HSL	hsl(200, 53%, 20%)
HSV	hsv(200, 69%, 31%)
CMYK	cmyk(69.2%, 23.1%, 0%, 69.4%)
CIE-LAB	lab(23.59, -6.43, -14.79)
CIE-LCH	lch(23.59, 16.13, 246.49°)
OKLab	oklab(33.85% -0.0312 -0.0414)
OKLCH	oklch(33.85% 0.052 233)
XYZ	xyz(3.3672, 3.9756, 7.7962)
Luminance	0.0398 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C4E #4E2A18

analogous

#184E45 #183C4E #18214E

triadic

#183C4E #4E183C #3C4E18

tetradic

#183C4E #45184E #4E2A18 #214E18

square

#183C4E #45184E #4E2A18 #214E18

split-complementary

#183C4E #4E1821 #4E4518

monochromatic

#071217 #0A181F #183C4E #26607D #3584AC

Accessibility & contrast

On white

11.70

#183C4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#183C4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C4E

11.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C4E	#FFFFFF	#000000	##FFFFFF
##183C4E	1.00	11.70	1.80	11.70
#FFFFFF	11.70	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#333B4F

Deuteranopia (green-blind)

#2C364E

Tritanopia (blue-blind)

#004142

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #183c4e;
/* rgb */ color: rgb(24, 60, 78);
/* oklch */ color: oklch(33.9% 0.052 233.0);

Tailwind

colors: {
  custom: {
    50: '#5c717f',
    500: '#183c4e',
    950: '#000000',
  },
}

SCSS

$custom: #183c4e;
$custom-light: #5c717f;
$custom-dark: #000000;

JSON

{
  "hex": "#183c4e",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 78
  },
  "hsl": {
    "h": 200,
    "s": 52.941,
    "l": 20
  },
  "oklch": {
    "l": 0.33853,
    "c": 0.05187,
    "h": 233
  },
  "luminance": 0.03976
}

Semantic roles & 50–950 ramp

primary

#183C4E

secondary

#85553D

accent

#7C4BDC

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#04070A

muted

#797A7C

Preview Lab

Preview with #183C4E

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →